[Storage] Blob items are now shared between blobs. Ready for disk swap.

content/browser/fileapi/chrome_blob_storage_context.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/fileapi/chrome_blob_storage_context.h"
 
 #include "base/bind.h"
 #include "base/guid.h"
 #include "content/public/browser/blob_handle.h"
 #include "content/public/browser/browser_context.h"
@@ skipping 51 matching lines @@
 void ChromeBlobStorageContext::InitializeOnIOThread() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   context_.reset(new BlobStorageContext());
 }
 
 scoped_ptr<BlobHandle> ChromeBlobStorageContext::CreateMemoryBackedBlob(
     const char* data, size_t length) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
   std::string uuid(base::GenerateGUID());
-  scoped_ptr<storage::BlobDataBuilder> blob_data_builder(
-      new storage::BlobDataBuilder(uuid));
-  blob_data_builder->AppendData(data, length);
+  storage::BlobDataBuilder blob_data_builder(uuid);
+  blob_data_builder.AppendData(data, length);
 
   scoped_ptr<storage::BlobDataHandle> blob_data_handle =
-      context_->AddFinishedBlob(*blob_data_builder.get());
+      context_->AddFinishedBlob(&blob_data_builder);
   if (!blob_data_handle)
     return scoped_ptr<BlobHandle>();
 
   scoped_ptr<BlobHandle> blob_handle(
       new BlobHandleImpl(blob_data_handle.Pass()));
   return blob_handle.Pass();
 }
 
 ChromeBlobStorageContext::~ChromeBlobStorageContext() {}
 
 void ChromeBlobStorageContext::DeleteOnCorrectThread() const {
   if (BrowserThread::IsMessageLoopValid(BrowserThread::IO) &&
       !BrowserThread::CurrentlyOn(BrowserThread::IO)) {
     BrowserThread::DeleteSoon(BrowserThread::IO, FROM_HERE, this);
     return;
   }
   delete this;
 }
 
 }  // namespace content